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function ex3
%EX3: create 2D and 3D meshes using mesh2d1, mesh2d2, mesh3d1, mesh3d2.
% Example:
% ex3
% See also: cs_demo
% CXSparse, Copyright (c) 2006-2022, Timothy A. Davis. All Rights Reserved.
% SPDX-License-Identifier: LGPL-2.1+
t1 = zeros (50,1) ;
t2 = zeros (50,1) ;
t3 = zeros (50,1) ;
t4 = zeros (50,1) ;
fprintf ('run times for each method, given n:\n') ;
for n = 2:50
tic ;
A = mesh2d1 (n) ;
t1 (n) = toc ;
tic
B = mesh2d2 (n) ;
t2 (n) = toc ;
tic
C = mesh3d1 (n) ;
t3 (n) = toc ;
tic
D = mesh3d2 (n) ;
t4 (n) = toc ;
fprintf ('%3d: %8.3f %8.3f %8.3f %8.3f\n', n, t1(n), t2(n), t3(n), t4(n)) ;
subplot (2,2,1) ; spy (A) ; title ('2D mesh, method 1') ;
subplot (2,2,2) ; spy (B) ; title ('2D mesh, method 2') ;
subplot (2,2,3) ; spy (C) ; title ('3D mesh, method 1') ;
subplot (2,2,4) ; spy (D) ; title ('3D mesh, method 2') ;
drawnow
end
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